Tetsuo Handa c5e3a41187 kernel: Initialize cpumask before parsing ... KMSAN complains that new_value at cpumask_parse_user() from write_irq_affinity() from irq_affinity_proc_write() is uninitialized. [ 148.133411][ T5509] ===================================================== [ 148.135383][ T5509] BUG: KMSAN: uninit-value in find_next_bit+0x325/0x340 [ 148.137819][ T5509] [ 148.138448][ T5509] Local variable ----new_value.i@irq_affinity_proc_write created at: [ 148.140768][ T5509] irq_affinity_proc_write+0xc3/0x3d0 [ 148.142298][ T5509] irq_affinity_proc_write+0xc3/0x3d0 [ 148.143823][ T5509] ===================================================== Since bitmap_parse() from cpumask_parse_user() calls find_next_bit(), any alloc_cpumask_var() + cpumask_parse_user() sequence has possibility that find_next_bit() accesses uninitialized cpu mask variable. Fix this problem by replacing alloc_cpumask_var() with zalloc_cpumask_var(). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20210401055823.3929-1-penguin-kernel@I-love.SAKURA.ne.jp		2021-04-10 13:35:54 +02:00
..
affinity.c
autoprobe.c
chip.c
cpuhotplug.c
debug.h
debugfs.c
devres.c
dummychip.c
generic-chip.c
handle.c
internals.h
ipi.c
irq_sim.c
irqdesc.c
irqdomain.c
Kconfig
Makefile
manage.c
matrix.c
migration.c
msi.c
pm.c
proc.c	kernel: Initialize cpumask before parsing	2021-04-10 13:35:54 +02:00
resend.c
settings.h
spurious.c
timings.c